I know someone who actually did something similar in RL. Basically he answered a call at work whilst working late and got into an argument with the caller, he became quite abusive and only part way through the call realised he was talking to one of the founders of the company.
He was actually asked the question "Do you know who I am?"
Quick thinking he responded with "Never mind who you are do you know who I am?"
Taken off guard the response was "No"
Down went the phone and he left the office rapidly hoping no-one saw him leave.